JPS6354807B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a polyester antistatic composite fiber with improved surface properties. More specifically, it has a highly antistatic property due to a small amount of antistatic component localized in the fibers, and is made by localizing a block polyether amide composition effective in antistatic properties in the fibers. The present invention relates to a polyester antistatic conjugate fiber containing active inorganic fine particles and having improved surface properties such as gloss, color development, and abrasion characteristics. As is well known, polyester fibers have excellent physical and chemical properties and are therefore widely used for clothing and industrial purposes. However, polyester fibers have a higher luster than other fibers such as acetate and silk.
The coloring properties were poor, and there was a strong desire for improvement. In addition, polyester fibers are hydrophobic and easily generate static electricity, which has the disadvantage of causing dust adhesion and clinging to clothing, which limits some of its application fields. Particularly on black or dark colored clothing, even a small amount of dust is noticeable, so it is strongly desired to prevent the generation of static electricity. Although various studies have been made to improve the drawbacks of polyester fibers, no polyester fibers having excellent gloss, color development, and antistatic properties have yet been obtained. The present inventors have arrived at the present invention as a result of intensive studies to solve the above-mentioned problems. That is, the structure of the present invention is such that the core is a mixture of polyester mixed with polyalkylene ether in a proportion of 0.05 to 5% by weight of the total fibers in the block polyether amide composition, and the periodic rule of silicon-containing inorganic fine particles is Contains 0.1 to 4% by weight of inert inorganic fine particles with an average primary particle diameter of 100 mμ or less selected from the group consisting of inorganic fine particles consisting of oxides and/or salts of group metals, and aluminum hydroxide; It is a polyester antistatic composite fiber with excellent gloss and color development, whose sheath component is polyester in which at least 70 mol% of the acid component is terephthalic acid component. The polyester in the present invention refers to a polyester containing ethylene glycol or 1,4-butanediol as the main glycol component and terephthalic acid or its ester as the main dicarboxylic acid component. A part of this dicarboxylic acid component is, for example, a monoalkali metal salt of 5-sulfoisophthalic acid, a dicarboxylic acid such as isophthalic acid, diphenyl dicarboxylic acid, naphthalene dicarboxylic acid, adipic acid, sebacic acid, dodecanedioic acid, or an ester thereof, p
- Oxycarboxylic acids such as -oxybenzoic acid, p-β-oxyethoxybenzoic acid or esters thereof may be substituted, and ethylene glycol or 1,4-butanediol may be replaced with carbon atoms such as
-10 alkylene glycol, 1,4-cyclohexanedimethanol, 1,4-bis(β-oxyethoxy)benzene, bisglycol ether of bisphenol A, polyalkylene glycol, etc. can be substituted with glycol other than the main glycol component. good. Furthermore, it is also possible to use a small proportion of a chain branching agent such as pentaerythritol, trimethylolpropane, trimellitic acid or trimesic acid, or a polymerization terminator such as monohydric polyalkylene oxide or phenylacetic acid. To produce polyester from such raw materials,
For example, dimethyl terephthalate is transesterified with ethylene glycol or 1,4-butanediol, terephthalic acid is directly esterified with ethylene glycol or 1,4-butanediol, or terephthalic acid is added with ethylene oxide. The most widely used method is to synthesize ethylene glycol or 1,4-butanediol ester of terephthalic acid and/or a low polymer thereof, and then subject the product to a polymerization reaction by a conventional method. Furthermore, in synthesizing the polyester in accordance with the present invention, catalysts, color inhibitors, ether bond by-product inhibitors, antioxidants, etc. well known in the art may be appropriately used. The silicon-containing inorganic fine particles in the present invention refer to 500
Contains 20% by weight or more of silicon as silicon oxide after heating at ℃ for 2 hours, does not inhibit the polyester synthesis reaction, does not cause extreme coloring during polyester synthesis, and is substantially insoluble in the polyester. means inorganic fine particles. Such inert inorganic fine particles may include talc, kaolin, silicon oxide, etc., regardless of whether they are obtained by crushing naturally occurring raw stones, synthesized, or surface-treated. In the present invention, the inorganic fine particles made of group metal oxides and/or their salts include zinc oxide, calcium carbonate, etc., regardless of whether they are crushed naturally occurring raw stones, synthetically obtained, or surface-treated. , calcium sulfate, and barium sulfate. Further, as the inert inorganic fine particles in the present invention, in addition to the silicon-containing inorganic fine particles and group metal oxides and/or salts thereof, aluminum oxide hydrate can be mentioned. Among these inorganic fine particles, silicon oxide is particularly preferred because it has a large effect of improving gloss and color development. In addition, silicon oxide has an alkyl group on the particle surface to prevent agglomeration during the polymerization reaction of polyester.
Particularly preferred is hydrophobic dry process silicon oxide in which the silanol groups on the particle surface are blocked. Here, the hydrophobic dry method silicon oxide that has an alkyl group on the particle surface and blocks the silanol group on the particle surface is:
For example, it is silicon oxide in which 30% or more of the silanol groups on the surface of silicon oxide fine particles are blocked by reacting dry silicon oxide with dialkyldichlorosilane. The alkyl group on the surface of the fine particles in the present invention is not particularly limited, but methyl and ethyl groups are particularly preferred. In general, in the production of polyester, titanium oxide is widely used as inert inorganic fine particles in addition to the inert inorganic fine particles of the present invention. However, titanium oxide does not exhibit the effects of imparting gloss with appropriate transparency and improving color development, which are one of the objectives of the present invention. The cause of this is not yet clear, but it is thought that one factor is probably that titanium oxide has a high refractive index, which increases the light reflectance on the fiber surface layer. The average primary particle diameter of the inert inorganic fine particles in the present invention needs to be 100 mμ or less. If it exceeds 100 mμ, the effect of improving color development will decrease, which is not preferable. Further, since coarse particles are inevitably mixed in, the number of coarse particles in the polymer increases, which is undesirable because troubles such as sand clogging or yarn breakage occur during the spinning process. Therefore, a method in which coarse particles are removed by classification by a generally well-known method such as a natural sedimentation method, a centrifugal separation method, or an air sieve classification method can be preferably used. Here, the average particle size is 50% by weight of all measured particles.
means the "equivalent spherical diameter" of the particle at the point.
"Equivalent Spherical Diameter" (ESD)
Diameter means the diameter of an imaginary sphere having the same volume as the particle, and can be calculated from electron micrographs of the particle or measurements by conventional sedimentation methods. The Mohs hardness of the inert inorganic fine particles in the present invention is preferably 5 or less, more preferably 4 or less. When inert inorganic fine particles with a Mohs hardness of more than 5 are used, they can damage the pins, guides, hot plates, etc. that the yarn comes into contact with in various processes such as spinning, drawing, temporary twisting, twisting, knitting, and weaving. This is undesirable because it causes significant abrasion and causes fuzzing and thread breakage. The wear characteristics caused by the inorganic fine particles present on the yarn surface as described above depend on the hardness of the inorganic fine particles. The Mohs hardness of pins, guides, and hot plates plated with iron-based materials that are widely used in various processes is around 5 to 8, and inorganic fine particles with a Mohs hardness of 5 or higher cause significant wear and are undesirable. . As the inert inorganic fine particles having a Mohs hardness of 5 or less, all of the inert inorganic fine particles specifically mentioned above can be used. The amount of inert inorganic fine particles added in the present invention is in the range of 0.1 to 4% by weight, particularly preferably in the range of 0.3 to 2% by weight, based on the polyester composition to be produced. If the amount is less than 0.1% by weight, the effect of improving gloss and color development will be insufficient, which is undesirable, and if the amount exceeds 4% by weight, the effect of increasing the amount of addition will not be saturated, which is not preferable. . Further, the inert inorganic fine particles in the present invention can be dispersed in aliphatic glycol, aliphatic alcohol, water, etc. by a known method, but it is particularly preferable to disperse them in glycol, which is a raw material for the polyester. The dispersion slurry of inert inorganic fine particles in the present invention can be prepared by a conventionally known method. For example, a method of dispersing the inert inorganic fine particles of the present invention and ethylene glycol in a high-speed stirrer having a plurality of shearing blades parallel to the direction of rotation as described in JP-A-53-125495 is preferred. Moreover, in order to remove coarse particles in the slurry prepared by the dispersion method, a method of removing coarse particles in the slurry by passing it through a filter can also be preferably used. Furthermore, conventionally known dispersants can also be used as dispersion aids. A polyester-based dispersant copolymerized with a tetraalkylammonium compound and an alkali metal sulfonic acid salt compound is preferable because it has a large effect of improving color development and preventing agglomeration of inert inorganic fine particles. Here, the tetraalkylammonium compounds include tetramethylammonium hydroxide, tetramethylammonium chloride, tetraethylammonium hydroxide, tetraethylammonium chloride, tetraethylammonium bromide, tetrapropylammonium hydroxide, tetrapropylammonium chloride,
Examples include tetraisopropylammonium oxide, tetraisopropylammonium chloride, tetrabutylammonium hydroxide, and tetrabutylammonium chloride, among which tetraethylammonium hydroxide is particularly preferred. In addition, as a sulfonic acid metal salt compound copolymerized polyester dispersant, 10 to 50 mol% of a sulfonic acid metal salt compound and 10 mol% of a glycol selected from the group consisting of diethylene glycol, triethylene glycol, tetraethylene glycol, and polyethylene glycol are used. Water-soluble polyesters containing the above are preferred. Note that a commonly used polyester synthesis method can be applied to the synthesis of the polyester dispersant. In the present invention, the glycol slurry of inert inorganic fine particles can be added at any stage until the polymerization of the polyester is completed, but especially before the start of the polymerization reaction of the polyester, the number of coarse inert inorganic fine particles is small. preferable. However, by changing the dispersion medium of inert inorganic fine particles,
If the so-called masterbatch method is used in which inert inorganic fine particles are dispersed at a high concentration in the same polyester as the polyester of the present invention, it can be added either after completion of polymerization or during spinning. The intrinsic viscosity ([η]) of the polyester chips in the present invention is preferably 0.45 or more, particularly preferably 0.60 or more, from the viewpoint of the number of coarse particles of the polyester chips obtained and the strength of the yarn after alkali dissolution treatment. The composition of the fiber in the present invention is a mixture in which a block polyether amide composition is mixed with the above-mentioned polyester such that the proportion of polyalkylene ether in the block polyether amide composition to the total fibers is 0.05 to 5% by weight. A polyester-based antistatic composite fiber with excellent luster and color development, which has a core of polyester and a sheath of the above-mentioned polyester, and a core and sheath arranged substantially concentrically, and a core ratio of 5 to 50% by weight polyester antistatic composite fiber with excellent gloss, color development, and abrasion properties. In addition, gloss using polyester which is silicon oxide in which the average primary particle diameter of the inert inorganic fine particles contained in the above-mentioned polyester is 100 mμ or less,
A polyester antistatic composite fiber with excellent color development and abrasion properties. The block polyetheramide composition used in the present invention is a block polyetheramide containing a predetermined amount of an organic metal salt and a phenolic antioxidant. The organic electrolyte mentioned here is formed from sulfonic acids such as dodecylbenzenesulfonic acid, tridecylbenzenesulfonic acid, nonylbenzenesulfonic acid, hexadecylsulfonic acid, and dodecylsulfonic acid, and alkali metals such as sodium, potassium, and lithium. There are alkali metal salts of sulfonic acid, alkali metal salts of phosphoric acid such as sodium distearyl phosphate, and alkali metal salts of other organic carboxylic acids, among which metal salts of sulfonic acid such as sodium dodecylbenzenesulfonate are good. be. Examples of phenolic antioxidants include 1,
3,5-trimethyl-2,4,6-tri(3,5-
Di-tert-butyl-4-hydroxybenzyl)benzene, 2,2'-methylenebis(4-methyl-6
-tert-butylphenol), 2,6-di-tert-
It is a phenolic derivative having a sterically hindered substituent adjacent to a phenolic hydroxyl group, such as butyl-p-cresol and 2,2'-methylenebis(4-ethyl-6-tert-butylphenol). Block polyether amide refers to a block copolymer of polyether and polyamide, and a mere blend of polyether and polyamide is not included in the block polyether amide referred to in the present invention. The polyether constituting the block polyether amide is a polyalkylene ether, which is a polymerization product of ethylene oxide and/or propylene oxide such as polyethylene ether, polypropylene ether, and polyethylene propylene ether. The molecular weight of these polyethers is preferably 1,000 or more, preferably 3,000 to 8,000, and among them, polyethylene glycol is most suitable. On the other hand, the polyamides that make up block polyetheramide are nylon 6, nylon 8, nylon
It is a homopolyamide such as 12, nylon 66, and nylon 610, or a copolymer containing these or other copolymer components, and is a homo or copolyamide produced by a polycondensation reaction of polyamide-forming components. A method for producing block polyether amide is, for example, by cyanoethylating both ends of polyalkylene glycol, hydrogenating it to form polyalkylene ether diamine, and reacting this with a suitable dicarboxylic acid such as adipic acid or sebacic acid to produce nylon. A method of synthesizing a salt and polycondensing this salt with the monomer forming the polyamide, and a method of aminating both ends of a polyalkylene glycol to form a polyalkylene ether diamine, and then polycondensing it in the same manner as the above method. The method for producing these block polyetheramides is not particularly limited. The weight ratio of the polyether component to the polyamide component in the block polyether amide is suitably 30-70:70-30. The polycondensation method for block polyether amide is not particularly limited, and may be a conventional polyamide polycondensation method, such as an ordinary pressure polymerization method often used for nylon 6, or a pressure polymerization method used for nylon 66. Legal methods can be used regardless of batch type or continuous type. The proportion of organometallic salt in the block polyetheramide composition should be between 1 and 10% by weight. A range of 3 to 7% by weight is particularly preferred. If it is less than 1% by weight, the effect of improving antistatic property is insufficient, and if it is more than 10% by weight, the antistatic property is deteriorated due to the worsening of the streak-forming ability due to a decrease in the melt viscosity of the block polyetheramide composition. In addition, the proportion of the phenolic antioxidant in the block polyether amide composition must be 1 to 10% by weight, particularly preferably in the range of 3 to 7% by weight, and if it is less than 1% by weight, it may be used during the spinning process or during temporary twisting. It is difficult to sufficiently suppress the deterioration of antistatic properties due to thermal oxidative deterioration in yarn processing processes such as fabric dyeing, and finishing processes.
If the amount exceeds 100%, the thermal oxidation suppressing effect will be saturated even if added.
It is difficult to recognize any effect beyond that. In addition to the organic metal salt and the phenolic antioxidant, other additives such as a matting agent, an anti-coloring agent, a fluorescent agent, a light-fastening agent, and a pigment may be added to the blocked polyetheramide composition of the present invention. There is nothing wrong with that. In addition, in the present invention, a mixture obtained by mixing a block polyether amide composition with a polyester such that the proportion of the polyalkylene ether component of the block polyether amide composition in the whole fiber is 0.05 to 5% by weight is used as the core. By using polyester as the sheath, it not only has excellent durability and good antistatic properties, but also has the same whiteness, heat resistance, light resistance, and dyeing light fastness as regular polyester yarn. It is possible to produce polyester fibers that do not cause peeling between the sheath parts and the sheath parts, and do not suffer from deterioration in quality due to fibrillation, without the troubles encountered with conventional antistatic yarns during spinning. If the proportion of the polyalkylene ether component in the entire fiber is less than 0.05% by weight, sufficient antistatic properties cannot be imparted, and if it exceeds 5% by weight, the antistatic property improvement effect is saturated and further improvement is impossible. Not only is this not as expected, but the yarn properties will deteriorate as the amount added increases. It is particularly preferable that the proportion of the polyalkylene ether component in the entire fiber is 0.1 to 1% by weight. The shape of the fiber cross section may be round, a modified cross section, or a mixture of a circular cross section and a modified cross section. The antistatic polyester conjugate fiber obtained by the present invention, which has excellent gloss, color development, and abrasion properties, can be applied to both filaments and staples. In addition, the fibers of the present invention can be blended with general synthetic fibers that do not have antistatic properties, semi-synthetic fibers such as acetate and rayon, and natural fibers such as wool and silk, and yarns, yarns, etc.
By twisting or interweaving, it is possible to obtain a fabric with good gloss, color development, and antistatic properties. When used as a filament, not only straight yarns but also highly twisted yarns and false-twisted yarns are applicable, but it is particularly preferable to use them as highly twisted yarns and false-twisted yarns. Furthermore, when fabrics made from highly twisted yarns and false-twisted yarns are dissolved and treated with an alkaline aqueous solution by a conventional method, the gloss and color development are further improved, and the commercial value of the fabrics can be further increased. The present invention will be specifically explained below with reference to Examples. In addition, the number of coarse particles, coloring properties, abrasion properties, relative viscosity of the block polyetheramide composition, intrinsic viscosity [η] of the polyester, electrical resistivity, frictional charging voltage, and fibrillation properties in the present invention are as follows. This is the value measured using the method. [Method for measuring the number of coarse particles] Approximately 10 mg of the sample is sandwiched between 18 mm x 18 mm cover glasses and thermocompressed on a hot plate at 280°C to 300°C to create a film with a diameter of approximately 10 mm. Observe this film with a phase contrast microscope (100x magnification), measure coarse particles with a maximum length of 10 μ or more, calculate the number of coarse particles per 10 mg of sample, and use the average value of 10 measurements per level. [Method for measuring color development] After knitting the filament yarn to be evaluated into a tubular knitted fabric using a 27-gauge tricot sock knitting machine [manufactured by Koike Kikai Seisakusho Co., Ltd.], a 0.2% nonionic activator was added using a conventional method. Sandets G-900 (manufactured by Sanyo Chemical Co., Ltd.)
It was scoured by boiling in boiling water containing 0.2% soda ash for 5 minutes, then washed with water and dried. Next, using a baking test device (MODEL-DK-1H, manufactured by Daiei Kagaku Seiki Seisakusho Co., Ltd.) adjusted to 180°C, a dry heat treatment was performed in a non-tensioned state for 30 seconds to set the cylindrical knitted fabric. Next, dyeing was carried out for 60 minutes in an aqueous solution of Sumikaron Black S-BB (disperse dye manufactured by Sumitomo Chemical Co., Ltd.) at 130°C in a bath ratio of 1:30 consisting of 10% OWF acetic acid 0.5cc/sodium acetate 0.2g/. After that, according to a conventional method, reduction cleaning was performed for 20 minutes in an aqueous solution of 80° C. consisting of 2 g of hydrosulfite, 2 g of caustic soda, and 2 g of a nonionic activator (SANDET G-900), followed by washing with water and drying. The color development was evaluated using a digital colorimetric color difference calculator (manufactured by Suga Test Instruments Co., Ltd.) by stacking six or more tube knitted fabrics and using the L value measured in a state where no irradiation light was transmitted.
The darker the color, the smaller the L value, and the lighter the color, the larger the value. [Abrasion resistance] As shown in Figure 1, a brass plate 1 with a thickness of 0.3 mm
The upper end of the thread tension is 0.35±0.02 (g/d), and the running speed is
The depth of wear on the brass plate was measured using a microscope after the yarn 2 was run at 135 m/min for 5 minutes. Judgment criteria

[Relative viscosity of block polyetheramide composition]

The sample was dissolved in 70% chloral hydrate to a concentration of 1%, and this was measured using an Ostwald viscometer at 25°C. [Intrinsic viscosity of polyester] Dissolve the sample in octochlorophenol solvent,
This is a value measured at 25°C using an Ostwald viscometer. [Electrical specific resistance] After washing the sample in a weak alkaline aqueous solution of 0.2% anionic surfactant for 2 hours using an electric washing machine,
Wash with water and dry. Next, the sample has a length (L) of 5
cm, fineness (D) 1000 denier fiber bundle 20
After controlling the temperature at ℃ and 40% RH for 2 days, measure the resistance of the sample with an applied voltage of 500V using an oscillating capacitance micropotential measuring device, and calculate it using the following formula. ρ=R×D/9× ¹⁰⁵ ×L×d ρ: Volume resistivity (Ω・cm) R: Resistance (Ω) d: Sample density (g/d) D: Fiber (denier) L: Sample Length (cm) [Friction electrification voltage] Cotton plain weave Kanakin No. 3 (wet weight 100 g/m ² ) was previously pasted, scoured, and bleached as the friction target fabric using a Kyoto University Chemical Research Rotary Static Tester (manufactured by Koa Shokai). Using a rotor rotation speed of 400 rpm,
This value was measured in an atmosphere with an applied voltage of 100 V, a temperature of 20°C, and a relative humidity of 30%. [Fibrillation property] Figure 2 shows a schematic diagram of a fibrillation tester. The wet sample (dyed knitted fabric) 3 is placed on the head 5 so that the friction area with the friction cloth 4 is 12.5 cm ² .
using holder 6, and place load 7 on top of it.
Make sure that the sum is 750g. On the other hand, the friction table 8 was attached via sandpaper 9 to prevent slipping, and eccentrically rotated at 85 rpm.
After rubbing for a minute, sample 3 is removed and the degree of fibrillation is visually determined. That is, when fibrillation occurs, the rubbed part looks whiter than the unrubbed part, so we observed how the rubbed part looked white and judged it in the following 5 stages. Grade 5: Frosting is not allowed. Grade 4: Slight frosting is observed. Grade 3: Slight frosting is observed. Grade 2: Frosting is quite noticeable. Grade 1: Significant frosting is observed. Example 1 100 parts of dimethyl terephthalate, 60 parts of ethylene glycol, 0.05 part of manganese acetate tetrahydrate, and 0.04 part of antimony trioxide were charged into a transesterification can.
The temperature was raised from 140° C. to 230° C. over a period of 4 hours under a nitrogen gas atmosphere, and the transesterification reaction was carried out while the generated methanol was continuously distilled out of the system. Subsequently, 0.05 part of trimethyl phosphate was added to the obtained product. In addition, 20% of dry process silicon oxide and tetraethylammonium hydroxide with an average primary particle size of 12 mμ
The weight ratio of aqueous solution and ethylene glycol is 5:
2.5:92.5 mixture with Janke & Kunkel Ultra
A slurry that was dispersed for 45 minutes using Turrax.T45DX (10,000 rpm) was added at a concentration of 1.0% to the obtained polyester as silicon oxide. The system was then gradually depressurized to 760 mm over 1 hour and 30 minutes.
The pressure was reduced from Hg to 1 mmHg, and at the same time the temperature was raised from 230°C to 280°C over 1 hour and 30 minutes. Polymerization was carried out for an additional 2 hours at a polymerization temperature of 280° C. for a total of 3 hours and 30 minutes under reduced pressure of 1 mmHg or less. After the reaction was completed, the polymer was discharged into water to obtain a rod-shaped polymer having a diameter of 3 mm. Further, the polymer was cut into lengths of 5 mm to obtain polyester pellets (A) having an intrinsic viscosity of 0.670 and a number of coarse particles of 20. 160% of the obtained polyethylene terephthalate (A)
It was vacuum dried at ℃ for 5 hours and used for spinning. The antistatic polymer (B) was produced by the following method. By reacting polyethylene glycol with acrylonitrile in the presence of an alkali catalyst and further performing a hydrogenation reaction, polyethylene glycol diamine (number average molecular weight 4000) in which more than 97% of both ends are amino groups was synthesized, and this was combined with adipic acid. A 45% aqueous solution of polyethylene glycol ammonium adipate was obtained by subjecting the mixture to a salt reaction using a conventional method. Add 200% of the above 45% polyethylene glycol diammonium adipate aqueous solution to a ^2m3 concentration can.
120 kg of 85% caprocutam aqueous solution and 16 kg of 40% hexamethylene diammonium isophthalate aqueous solution were charged, and heated under normal pressure for about 2 hours until the internal temperature reached 110°C, and concentrated to 80% concentration. Subsequently, the concentrated liquid was transferred to a polymerization can with a capacity of 800, and heating was started while flowing nitrogen into the polymerization can at a rate of 2.5/min. When the internal temperature reaches 120℃, add 5.2 kg of sodium dodecylbenzenesulfonate (DBS) and 1,3,5
Trimethyl-2,4,6-tri(3,5 ditert-
Add 5.2Kg of butyl 4-hydroxybenzyl)benzene (TTB) and start stirring until the internal temperature reaches
The mixture was heated to 245°C for 18 hours to complete polymerization. After the polymerization is complete, pressurize the can with nitrogen at 7 kg/cm ² (G) and rotate the molten polymer into a belt approximately 15 cm wide and 1.5 mm thick using an endless belt (length 6 m, belt material: stainless steel, surface coated with water). cooled with spray) and extruded onto
After cooling, it was pelletized in the usual manner. The relative viscosity of the pellets obtained was 2.18.
Using a known composite spinning device, pellets (B) made of the block polyether amide composition produced by the above method are mixed with 5% by weight of the above polyethylene terephthalate pellets (A), and the core component is a pellet. hopper and polyethylene terephthalate pellets (A) from the other hopper.
is supplied as a sheath component, and the composite ratio of core to sheath is 20:
Take-up speed of spinning concentric composite yarn of 80 (weight ratio)
Spinning was carried out at 1350 m/min. The obtained undrawn yarn was heated to a hot plate at a temperature of 140°C.
The yarn was drawn by a factor of 3.21 to obtain a drawn yarn of 75 denier and 36 filaments. Both spinnability and stretchability were good. The electrical resistivity of the drawn yarn obtained was 12×10 ⁸ Ω・cm,
The abrasion resistance was 45 microns, which was extremely good. A knitted fabric knitted and dyed with this yarn had a frictional charging voltage of 900V, showing good antistatic properties. Further, the gloss was a mild gloss with appropriate transparency, and the color development was good with an L value of 14.1.
Further, the fibrillation property was good as 4th grade. Example 2 According to the polymerization recipe of Example 1, 1% by weight of various hydrophobic silicon oxides obtained by reacting dry method silicon oxide and dialkyldichlorosilane was added and polymerized to obtain polyester pellets. Silk spinning was carried out in the same manner as in Example 1 using the obtained polyester pellets. The characteristics of the obtained fibers were as shown in Table 1.

[Table] Example 3 According to the polymerization recipe of Example 1, 1% by weight of inorganic fine particles with different Mohs hardnesses were added and polymerization was carried out.
Polyester pellets containing different types of inorganic fine particles were obtained. Silk spinning was carried out in the same manner as in Example 1 using the obtained polyester pellets. The properties of the obtained fibers were as shown in Table 2.

[Table] No.1 and No.2 have good abrasion resistance and gloss, but
No. 3 was poor in both abrasion resistance and gloss. Example 4 Spinning and drawing was carried out under exactly the same conditions as in Example 1, except that the amount of sodium dodecylbenzenesulfonate (DBS) used as the organic metal salt was varied. The electrical resistance of the obtained drawn yarn was as shown in Table 3.

[Table] No. 1 and No. 5 in Table 3 are comparative examples for clarifying the effects of the present invention. That is, No. 1 in which DBS in the block polyether amide composition is less than 1%.
1 and No. 5, which exceeds 10%, both have insufficient antistatic properties. Comparative Example 1 Except that 1,3,5-trimethyl-2,4,6-tri(3,5-di-tert-butyl-4-hydroxybenzyl)benzene (TTB) was not added,
Spinning and drawing were carried out under exactly the same conditions as No. 2 of Example 4. Both spinnability and stretchability were good. The electrical resistivity of the drawn yarn is 120×10 ⁸
It was Ω・cm. Furthermore, the drawn yarn was heated to a temperature of 215
The processed yarn was obtained by temporarily twisting the spindle at ℃, but
The antistatic performance of the processed yarn was extremely poor.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an abrasion tester. FIG. 2 is a schematic diagram of a testing machine for evaluating fibrillation. 1: 0.3mm thick brass plate, 2: Thread, 3: Sample,
4: Friction cloth, 5: Friction head, 6: Holder,
7: Load, 8: Friction table, 9: Sandpaper.

Claims (1)

[Scope of Claims] 1. In a block polyether amide composition containing 1 to 10% by weight of an organic metal salt and 1 to 10% by weight of a phenolic antioxidant, the ratio of polyalkylene ether to the total fibers is 0.05 to 10% by weight. A group consisting of silicon-containing inorganic fine particles, inorganic fine particles consisting of oxides and/or salts of group metals of the periodic table, and aluminum oxide hydrate, with a core consisting of a mixture made by mixing with polyester at a concentration of 5% by weight. The sheath portion is made of polyester containing 0.1 to 4% by weight of inert inorganic fine particles having an average primary particle diameter of 100 mμ or less selected from the following, and at least 70 mol% of the total acid component is a terephthalic acid component. Polyester antistatic composite fiber. 2. The polyester antistatic composite fiber according to claim 1, wherein the inert inorganic fine particles have a Mohs hardness of 5 or less. 3. The polyester-based antistatic property according to claim 2, wherein the inert inorganic fine particles are hydrophobic dry process silicon oxide having an alkyl group on the particle surface and blocking the silanol group on the particle surface. Composite fiber. 4. The polyester antistatic composite fiber according to claim 1, wherein the core and sheath are arranged substantially concentrically, and the ratio of the core is 5 to 40% by weight.